# Amazon Creators API vs Best Buy Developer API

> Amazon Creators scores 48.7 (D) to Best Buy Developer's 39.1 (E) for product search for shoppers. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/amazon-creators-api-vs-best-buy
- Markdown: https://www.anchorterminal.com/compare/amazon-creators-api-vs-best-buy.md (~2,100 tokens)
- Slim: https://www.anchorterminal.com/compare/amazon-creators-api-vs-best-buy.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/amazon-creators-api-vs-best-buy.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-14

Amazon Creators API scores 48.7 (D) on agent readiness against Best Buy Developer API's 39.1 (E), and leads in 6 of 7 scored categories. Best Buy Developer API leads on payments & pricing. Both do product search for shoppers.

- Amazon Creators API: grade D, 48.7/100, rank #862 of 1076. Markdown https://www.anchorterminal.com/tools/amazon-creators-api.md · JSON https://www.anchorterminal.com/api/v1/tools/amazon-creators-api.json
- Best Buy Developer API: grade E, 39.1/100, rank #991 of 1076. Markdown https://www.anchorterminal.com/tools/best-buy.md · JSON https://www.anchorterminal.com/api/v1/tools/best-buy.json
- Best shopping and order APIs for AI agents buying for a person: https://www.anchorterminal.com/best/shopping/index.md
- All 8 shopping comparisons: https://www.anchorterminal.com/compare/shopping/index.md

## Which one, for what

### Amazon Creators API (D)

Good for: Product search, price checks and affiliate links for an agent that recommends Amazon products and hands the purchase to the person.

Ahead on:
- Reliability, 45 against 31
- Schema & documentation, 50 against 45
- Agent ergonomics, 85 against 72
- Security & auth, 48 against 32
- Maintenance & community, 41 against 5
- Transparency & trust, 52 against 47

Watch for: No order, cart, checkout, order status or return operation

### Best Buy Developer API (E)

Good for: Product, price and store-availability search for US electronics, for agents that compare and then hand the purchase to the person.

Ahead on:
- Payments & pricing, 30 against 10

Watch for: Ordering, fulfilment, order lookup and cancellation are only in the Commerce API, which is invite-only with documentation shared after approval


## Score by category

| Category | Weight | Amazon Creators API | Best Buy Developer API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 45 | 31 | Amazon Creators API +14 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 50 | 45 | Amazon Creators API +5 |
| Agent ergonomics | 13% (16.2 this run) | 85 | 72 | Amazon Creators API +13 |
| Security & auth | 14% (17.5 this run) | 48 | 32 | Amazon Creators API +16 |
| Payments & pricing | 10% (12.5 this run) | 10 | 30 | Best Buy Developer API +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 41 | 5 | Amazon Creators API +36 |
| Transparency & trust | 7% (8.8 this run) | 52 | 47 | Amazon Creators API +5 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **48.7 · D** | **39.1 · E** | |

## Facts side by side

| Fact | Amazon Creators API | Best Buy Developer API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Amazon.com Services LLC | BestBuy.com, LLC (Best Buy Co., Inc.) |
| Hosted endpoint | `https://creatorsapi.amazon/catalog/v1` | `https://api.bestbuy.com/v1/` |
| Transports | HTTP | HTTP |
| Auth | OAuth | API key |
| Pricing | Free | Free |
| x402 | no | no |
| Licence | Proprietary service under the Amazon Associates Program Operating Agreement and its IP Licence for each locale | Proprietary service under the Best Buy Developer API terms. The SDKs in the BestBuyAPIs GitHub organisation are open source |
| Read-only variant documented | yes | no |
| llms.txt | no | no |
| Last release | 2026-08-21 | none |
| Terms last updated | 2025-10-15 | 2021-02-23 |
| Privacy policy last updated | 2026-06-30 | couldn't be read |
| Customer content may train models | yes | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | yes | yes |
| Popularity | none | 489 npm/wk |

## Verdicts

**Amazon Creators API.** Read-only product search and lookup across 22 Amazon stores, with field selection, typed error reasons and documented rate limits. It cannot place or follow orders, so a person buys through the affiliate link. Access needs an accepted Associates account with 10 qualifying sales in 30 days, and the Agent Terms require agents to identify themselves.

**Best Buy Developer API.** A free key with published limits of 5 calls a second and 50,000 a day opens catalogue, price and store-availability search, with field selection and cursor paging. Ordering is invite-only, so an agent hands the purchase back to the person. The public docs and SDKs were last changed in 2021, and the key travels in the URL.

## Before you call either

### Amazon Creators API

1. Send x-marketplace as a header and marketplace and partnerTag in the body on every call
2. Cache the access token for its 3,600 seconds and share it across processes
3. Request only the resources the task needs, and use offersV2 for prices, because the older price resource is gone
4. Set the user agent to Agent/<name> as the Associates Agent Terms require
5. Hand purchases to the person through the returned detailPageURL without editing its parameters

### Best Buy Developer API

1. Add format=json to Products, Stores and Categories calls. XML is the default for those three
2. Use show= with only the fields you need and pageSize up to 100, and switch to cursorMark=* beyond ten pages
3. Batch SKU lookups with the in operator to stay under 5 calls a second. A 403 can mean the limit, not a bad key
4. Send the person to the product URL to buy. The Commerce API that places orders needs a partner invitation
5. Cache responses for no more than 72 hours and refresh prices before quoting them, as the terms require

## Questions

### Which is better for AI agents, Amazon Creators API or Best Buy Developer API?

Amazon Creators API scores 48.7 (D) on agent readiness against Best Buy Developer API's 39.1 (E), and leads in 6 of 7 scored categories. Best Buy Developer API leads on payments & pricing.

### Do Amazon Creators API and Best Buy Developer API need an API key?

Amazon Creators API uses an OAuth sign-in. Best Buy Developer API needs an API key.

### Can an agent call Amazon Creators API and Best Buy Developer API without installing anything?

Yes. Amazon Creators API has a hosted endpoint at https://creatorsapi.amazon/catalog/v1 and Best Buy Developer API at https://api.bestbuy.com/v1/.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/amazon-creators-api-vs-best-buy.json, and with the fewest tokens: https://www.anchorterminal.com/compare/amazon-creators-api-vs-best-buy.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "amazon-creators-api", "b": "best-buy"}`. From a terminal: `anchor compare amazon-creators-api best-buy`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/amazon-creators-api.json and https://www.anchorterminal.com/api/v1/tools/best-buy.json

## Other comparisons with Amazon Creators API or Best Buy Developer API

- [Amazon Creators API vs Etsy Open API v3](https://www.anchorterminal.com/compare/amazon-creators-api-vs-etsy.md)
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- [Best Buy Developer API vs Etsy Open API v3](https://www.anchorterminal.com/compare/best-buy-vs-etsy.md)
- [Best Buy Developer API vs Walmart Affiliate Marketing API](https://www.anchorterminal.com/compare/best-buy-vs-walmart-affiliate-api.md)
- [Amazon Creators API vs Instacart Developer Platform API + MCP](https://www.anchorterminal.com/compare/amazon-creators-api-vs-instacart.md)